is there a way i can disconnect the posts, for example does anybody know how to remove this from in between posts leaving the little space there like in mybb 1.4
It looks as if it's probably a plug-in the does that so you can tell the difference. You would need to contact your plug-in providers.
MyBB 1.4 > Each Post a new Table
MyBB 1.2 > Each Post a new Row
The green part you see at the screen; is located in postbit_seperator.
You would need to recreate the postbit template if you want to achieve the same layout as MyBB 1.4.